Commit 95d620ad authored by Fangzhi Zuo's avatar Fangzhi Zuo Committed by Alex Deucher

drm/amd/display: HDMI remote sink need mode validation for Linux

[Why]
Currently mode validation is bypassed if remote sink exists. That
leads to mode set issue when a BW bottle neck exists in the link path,
e.g., a DP-to-HDMI converter that only supports HDMI 1.4.

Any invalid mode passed to Linux user space will cause the modeset
failure due to limitation of Linux user space implementation.

[How]
Mode validation is skipped only if in edid override. For real remote
sink, clock limit check should be done for HDMI remote sink.

Have HDMI related remote sink going through mode validation to
elimiate modes which pixel clock exceeds BW limitation.
Signed-off-by: default avatarFangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: default avatarHersen Wu <hersenxs.wu@amd.com>
Acked-by: default avatarEryk Brol <eryk.brol@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent dc3de516
...@@ -2441,7 +2441,7 @@ enum dc_status dc_link_validate_mode_timing( ...@@ -2441,7 +2441,7 @@ enum dc_status dc_link_validate_mode_timing(
/* A hack to avoid failing any modes for EDID override feature on /* A hack to avoid failing any modes for EDID override feature on
* topology change such as lower quality cable for DP or different dongle * topology change such as lower quality cable for DP or different dongle
*/ */
if (link->remote_sinks[0]) if (link->remote_sinks[0] && link->remote_sinks[0]->sink_signal == SIGNAL_TYPE_VIRTUAL)
return DC_OK; return DC_OK;
/* Passive Dongle */ /* Passive Dongle */
......
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